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House Extensions Wembley

Single and double storey extensions in Wembley. Trusted, professional, 30+ years' hands-on experience.

GS Renovation designs and builds extensions across Wembley, tailored to the 1930s and interwar semis that dominate HA9. With over 30 years of building experience in Brent, we take on rear, side-return and wrap-around projects, using the generous plots these suburban houses enjoy to add genuine, well-built living space rather than a cramped box on the back.

Steel and new floor joists set out on a rear extension built by GS Renovation at a UK home
The steel seated and the joists hung off it, with the cavity wall closed and scaffold still in place.

Rear and side extensions on Wembley plots

The wide plots and side passages of Wembley's interwar semis lend themselves to side-return and wrap-around extensions that many tighter London terraces cannot manage. A typical HA9 project extends the kitchen into the side alley and out to the rear, creating an open-plan kitchen-diner that opens onto the back garden. We dig and pour the foundations to the depth building control requires, allowing for any nearby trees on these leafier suburban plots, then build up in matching brick or render.

Steel beams carry the old rear wall once the opening is formed, and we tie the new roof, whether a flat roof with lantern or a pitched addition, into the existing 1930s structure. Because these are semi-detached pairs, a party wall notice to the adjoining owner is usually part of the process. We manage the groundworks, the steel, the roof and the weathertight shell as a continuous sequence.

Planning and building control in Brent

Whether your Wembley extension is permitted development or needs a full planning application depends on the property and how far you go. Many single-storey rear extensions on these interwar plots fall under permitted development, but double-storey work, anything close to a boundary, or a home already extended will often need permission from Brent Council. We assess your specific house honestly and, where required, help prepare and submit the planning application rather than leaving you to guess.

Every extension, whatever its planning route, must meet building regulations. Brent building control inspects the foundations, the damp proofing, the steelwork, insulation and drainage at set stages. We book these inspections and keep the paperwork straight so your completion certificate arrives cleanly. From first sketch to the final fit-out of kitchen, bathroom, plastering and decoration, one team runs the whole job across HA9.

  • Side-return and rear extensions
  • Architectural drawings and structural engineer coordination
  • Insulation, airtightness and thermal detailing to regulations
  • Single and double storey extensions
  • Drainage diversion and build-over agreements with the water authority
Service areaWembley · HA9
Local authorityBrent Council
Part ofNorth West London (Outer London)
Typical homesInterwar semis and modern apartments
Also covered nearbyWillesden, Kilburn, Harlesden and Brent

The GS Renovation Difference in Wembley

Homeowners in Wembley choose GS Renovation because we know how to use the generous interwar plot without falling foul of Brent Council or the party wall rules that come with semi-detached houses. With 30+ years locally, we handle foundations, steel, roof and fit-out under one roof, and we tell you straight whether you need planning permission.

  • Garden levels and access made good where the build meets outside
  • A written scope and programme agreed before work starts
  • Itemised pricing, so you can see what every stage costs
  • Clean, tidy and reliable tradespeople
  • Insulation and thermal detailing to current regulations
  • One point of contact on the phone, not a call centre
30+ YearsFounder's experience
Fully Insured5 year guarantee
4.9 / 531 MyBuilder reviews
Building ControlCompliant
Free QuotesNo obligation
Reviews

Rated 4.9 / 5 by our clients

★★★★★ 4.9 average from 31 verified reviews on MyBuilder

★★★★★
Very friendly and I am very pleased with the work he has done, also very clean worker and enthusiastic about his work. Can not fault this company!!!!…
natalie89391Stevenage · via MyBuilder
★★★★★
George was very friendly and helpful from start to finish. He worked really hard to ensure our kitchen was installed to a high standard and was…
sophie35636Wanstead, London · via MyBuilder
★★★★★
Really happy with the quality of remedial works carried out by George in putting other previous tradesman work right. He was very helpful, honest and…
archeryWaltham Cross · via MyBuilder
Read all 31 reviews

FAQ

Frequently Asked Questions about House Extensions Wembley

Is a cheap house extensions quote in Wembley worth taking?

Only if it covers the same work, and usually it does not. A low house extensions figure for a Wembley home normally excludes the engineer, the Brent Council application or the making good, all of which still have to be paid for at the HA9 property. GS Renovation itemises so the comparison is honest. Ask the cheaper Brent quotation for the same breakdown. Ring 07472 424 226 and GS Renovation will go through both Wembley quotations with you. As a rough guide, house extensions in London typically starts from roughly £40,000 for a single-storey rear extension and rises with size and specification (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.

How many trades are on site during house extensions in Wembley?

Fewer at once than you might expect, by design. Stacking trades into an HA9 property makes a house extensions job feel busy while achieving very little, so GS Renovation sequences them and keeps the Wembley site workable. You always know who is due and when. The programme issued with the Brent quotation names each stage and each week. The Wembley programme names who is coming to the HA9 property in each Brent week.

Can I see reviews of your house extensions work near Wembley?

Read them before you speak to us, ideally. The MyBuilder reviews describe how house extensions projects actually ran, which is more useful to a Wembley homeowner than any claim we could make about the HA9 job. GS Renovation holds a 4.9 rating across 31 reviews. We will supply addresses too, so you can look at finished Brent work. Email info@gsrenovationltd.co.uk for details. Ask for HA9 addresses and visit a finished Brent job.

What are the permitted development limits in Wembley?

For a single-storey rear extension, commonly 3 metres on a terraced or semi-detached house and 4 on a detached one, with a larger allowance available under prior approval. Those rights are withdrawn in conservation areas and where Article 4 applies, so we confirm your HA9 status with Brent Council.

Will house extensions damage original features in a 1920s and 1930s suburban Wembley home?

Not if the work is planned around them, which is what we do. Cornice, fireplaces, sash windows and original floors at an HA9 property are identified before house extensions begins, and GS Renovation agrees with you which are being retained. Protection goes up before any structural work starts. Reinstatement afterwards is matched rather than approximated in the Wembley house. GS Renovation will explain how house extensions protects original detail at an HA9 address in Wembley.

Will my Wembley extension need planning permission or is it permitted development?

It depends on your house. Many single-storey rear extensions on Wembley's interwar plots qualify as permitted development, but a double-storey addition, work near the boundary, or a previously extended home usually needs a planning application to Brent Council. Either way, building regulations always apply. We assess your specific HA9 property and handle any planning submission needed.

Can you take on house extensions in Willesden as well as Wembley?

Both are covered, and often in the same week. GS Renovation is usually on more than one Brent site at a time, which is why house extensions in Willesden or Wembley can normally be surveyed quickly. There is no travel surcharge between them. Email info@gsrenovationltd.co.uk with the HA9 postcode and we will book a visit. Quotes are free and carry no obligation. Aftercare reaches both addresses from the same team across Brent.

Every Service, One Team

More GS Renovation Services in Wembley

The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Wembley. Explore what else we do locally:

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Free, no-obligation quote for house extensions in Wembley. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.

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